MARILYN HARTER ARNP
NPI 1124401922
Nurse Practitioner in Marshalltown, IA

Q: What is Marilyn Harter's NPI number?

The NPI number for Marilyn Harter is 1124401922. It was assigned to this individual provider in the NPPES registry on June 30, 2015.

Q: What is Marilyn Harter's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Marilyn Harter was last updated on December 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 30, 2015PECOS EnrolledAccepts Medicare Assignment

412 E CHURCH ST, MARSHALLTOWN, IA 50158(641) 753-4021(641) 753-4025 Get Directions Write a Review

NPPES record last updated: December 21, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 21, 2025, Jun 7, 2024, Aug 12, 2021 and 1 more (4 updates tracked since 2016).

On this page

About Marilyn Harter Arnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARILYN HARTER ARNP (NPI 1124401922) is an individual nurse practitioner in Marshalltown, Iowa, licensed in Iowa (A097804) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Mercyone Des Moines Medical Center, and maintains a secondary practice location in Indianola.

NPPES Registry Identity

NPI1124401922

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMARILYN HARTERCredential: ARNP

Location Address412 E CHURCH STMarshalltown, IA 50158-2947

Mailing AddressPo Box 674721Dallas, TX 75267-4721 · (515) 643-2519 · Fax (515) 461-9783

Phone(641) 753-4021

Fax(641) 753-4025

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateJune 30, 2015

Last NPPES UpdateDecember 21, 20254 updates tracked since enumeration

NPPES CertifiedDecember 21, 2025

✔ NPI 1124401922 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in IA · A097804

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

412 E CHURCH ST, Marshalltown, IA 50158

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Secondary Practice Location 1

Location 12006 N 4th St Ste 200Indianola, IA 50125-4500 · Phone (515) 461-9784 · Fax (515) 461-9783

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marilyn Harter Arnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527364470

PECOS Enrollment IDI20160303000046

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Marilyn Harter reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Clinics Inc

31 mi

Primary Care

19 E HOWARD ST
Colfax, IA 50054

Reassigned Medicare billing, Iowa enrollment
516 clinicians in this Medicare group

NPI 1831110816 (515) 674-4682

Sincera Health PLLC

44 mi

Urgent Care

1518 WASHINGTON ST
Pella, IA 50219

Reassigned Medicare billing, Iowa enrollment
5 clinicians in this Medicare group

NPI 1235929225 (641) 255-2688

Broadlawns Medical Center

48 mi

General Acute Care Hospital

1801 HICKMAN RD
Des Moines, IA 50314

Reassigned Medicare billing, Iowa enrollment
518 clinicians in this Medicare group

NPI 1467447508 (515) 282-2200

Knoxville Community Hospital Inc

52 mi

Family Medicine

1202 W HOWARD ST
Knoxville, IA 50138

Reassigned Medicare billing, Iowa enrollment
Also billed through NPI 1922087915 (Iowa)
156 clinicians in this Medicare group

NPI 1578570677 (641) 828-7211

Mercyone Urgentcare

139 mi

Clinic/Center

2400 LILLIAN WAY
Clinton, IA 52732

Reassigned Medicare billing, Iowa enrollment
34 clinicians in this Medicare group

NPI 1447995766 (563) 559-7833

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

85 services74 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

72 services72 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

52 services45 patients

Detection test by immunoassay with direct visual observation for influenza virus 87804

This is a test that identifies the influenza virus in your body. It works by using an immunoassay, a method that detects the presence of the virus through an immune response. The results are directly observable, making it a quick and efficient way to diagnose flu.

46 services23 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

45 services45 patients

Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) 87811

This is a test to detect COVID-19, the virus causing severe respiratory illness. It uses a method called immunoassay, which identifies the virus by its unique proteins. The test is directly observed for accuracy. It helps determine if you're currently infected.

37 services36 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercyone Des Moines Medical Center

Acute Care Hospitals · Des Moines, IA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160083

Location1111 6th AveDes Moines, IA 50314 · Polk County

Emergency services Birthing friendly

Knoxville Hospital & Clinics

Critical Access Hospitals · Knoxville, IA

OwnershipVoluntary non-profit - Private

CMS Certification Number161355

Location1002 South Lincoln StreetKnoxville, IA 50138 · Marion County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50158 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$81.84 typical visit price

range $52.96 – $161.40

Typical copayment $20.46 (range $13.24 – $40.35)

Most-billed visit code 99203

Established Patient

$94.05 typical visit price

range $16.91 – $131.98

Typical copayment $23.51 (range $4.22 – $32.99)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

4 suppliers13 claims33 services$5.39 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. CHARLES RICHARD ROBSON L.M.S.W.

Social Worker